Vehicle-mounted antenna device

Abstract

A vehicle-mounted antenna device includes an antenna, an electronic component, a coaxial cable and a shielding member. The electronic component is electrically isolated from the antenna. The electronic component has a coaxial connector including an inner terminal and an outer terminal. The coaxial cable has one end connected to the coaxial connector. The shielding member is grounded to a vehicle body being ground. The shielding member is configured to block at least part of noise generated from the electronic component from reaching the antenna. The coaxial cable includes an inner conductor connected to the inner terminal and an outer conductor connected to the outer terminal. The electronic component is electrically connected to the shielding member via only the outer terminal.

The invention claimed is: 
     
       1. A vehicle-mounted antenna device comprising:
 an antenna; 
 an electronic component electrically isolated from the antenna, the electronic component comprising a coaxial connector including an inner terminal and an outer terminal; 
 a coaxial cable with one end connected to the coaxial connector; and 
 a shielding member grounded to a vehicle body being ground, the shielding member being configured to block at least part of noise generated from the electronic component from reaching the antenna, 
 the coaxial cable including an inner conductor connected to the inner terminal and an outer conductor connected to the outer terminal, and 
 the electronic component being electrically connected to the shielding member via only the outer terminal. 
 
     
     
       2. The vehicle-mounted antenna device according to  claim 1 , further comprising
 an antenna base configured to function as ground for the antenna,
 wherein the shielding member and the antenna base are electrically connected to each other. 
 
 
     
     
       3. The vehicle-mounted antenna device according to  claim 2 , further comprising
 a fixing member configured to fix the shielding member to the antenna base, 
 the shielding member being electrically connected to the antenna base via the fixing member. 
 
     
     
       4. The vehicle-mounted antenna device according to  claim 1 , wherein
 the shielding member has a portion located between the electronic component and the antenna. 
 
     
     
       5. The vehicle-mounted antenna device according to  claim 1 , wherein
 the electronic component is a camera including a body and an optical section including a lens, 
 the body includes the coaxial connector and the optical section, and 
 the shielding member covers at least the body and has an opening for exposing the lens. 
 
     
     
       6. The vehicle-mounted antenna device according to  claim 2 , wherein
 the shielding member has a portion located between the electronic component and the antenna. 
 
     
     
       7. The vehicle-mounted antenna device according to  claim 3 , wherein
 the shielding member has a portion located between the electronic component and the antenna. 
 
     
     
       8. The vehicle-mounted antenna device according to  claim 2 , wherein
 the electronic component is a camera including a body and an optical section including a lens, 
 the body includes the coaxial connector and the optical section, and 
 the shielding member covers at least the body and has an opening for exposing the lens. 
 
     
     
       9. The vehicle-mounted antenna device according to  claim 3 , wherein
 the electronic component is a camera including a body and an optical section including a lens, 
 the body includes the coaxial connector and the optical section, and 
 the shielding member covers at least the body and has an opening for exposing the lens. 
 
     
     
       10. The vehicle-mounted antenna device according to  claim 4 , wherein
 the electronic component is a camera including a body and an optical section including a lens, 
 the body includes the coaxial connector and the optical section, and 
 the shielding member covers at least the body and has an opening for exposing the lens.